ButtonToggle

ButtonToggle (FB)

FUNCTION_BLOCK ButtonToggle

Short description

Switching element with button and central control. Typical application: light pushbutton and light output.

Representation

Interfaces

Inputs

Name	Data type	Value range	Initial value	Function
xButton	BOOL			Input - operating button
xCentralOn	BOOL			Central switch-on
xCentralOff	BOOL			Central switch-off

Outputs

Name	Data type	Value range	Initial value	Function
xOut	BOOL			Enable - output

Setpoints / Parameters

Name	Data type	Value range	Initial value	Function
xButtonVisu	BOOL		FALSE	Function as xButton

Function description

General

The function block is generally used for direct control of the enable - output xOut depending on the rising edges at the inputs xButton (= operating button), xCentralOn (= central switch-on), xCentralOff (= central switch-off) and the setpoint / parameter xButtonVisu. Every rising edge at the input - operating button xButton and / or at the setpoint / parameter xButtonVisu switches the output xOut to the opposite state, provided no central control is taking place. If no rising edges are detected, the state of the enable - output xOut does not change.

Function table

xButton or xButtonVisu	xCentralOn	xCentralOff	xOut	Note
FALSE, TRUE, H/L	FALSE, TRUE, H/L	FALSE, TRUE, H/L	unchanged	Inputs not active
L/H	FALSE, TRUE, H/L	FALSE, TRUE, H/L	FALSE > TRUE, TRUE > FALSE	State change at the output
FALSE, TRUE, H/L	L/H	FALSE, TRUE, H/L	TRUE	Central switch-on
FALSE, TRUE, H/L	FALSE, TRUE, H/L	L/H	FALSE	Central switch-off
L/H	L/H	FALSE, TRUE, H/L	TRUE	Central switch-on (higher priority)
L/H	L/H	L/H	FALSE	Central switch-off (highest priority)

Legend: L/H … rising edge, H/L … falling edge

CODESYS

InOut:

Scope	Name	Type	Initial
Input	xButton	BOOL
Input	xCentralOn	BOOL
Input	xCentralOff	BOOL
Input Const	xButtonVisu	BOOL	FALSE
Output	xOut	BOOL